css重置

出自于百度文库

最近看到一个词叫css reset。什么叫做css reset呢？我理解为重置css，也就是重置默认样式。我在HTML下的默认样式中讲到，一些标签元素在HTML下有一个默认属性值，我们在写css页面的时候，为了避免在css中重复定义它们，我们需要重置默认样式（css reset）。每个人的用法和写法都不一样。找到一篇关于css reset的调查文章， 可以看看国外使用css reset的比例调查。

这里有一篇总结css reset比较全面的文章，列举了多种css reset的写法，可以看看。

译文地址查看 原文地址查看

接下来我也查看了国内的两个网站，用Firebug按F12看看他们的css reset怎么写的？

淘宝（www.taobao.com）：

html {

overflow-x:auto; overflow-y:scroll; }

body, dl, dt, dd, ul, ol, li, pre, form, fieldset, input, p, blockquote, th, td {

font-weight:400; margin:0; padding:0; }

h1, h2, h3, h4, h4, h5 { margin:0; padding:0; }

百度有啊(www.youa.com)：（架构基本上是模仿YUI来做的）

body {

font-family:arial,helvetica,sans-serif; font-size:13px;

font-size-adjust:none; font-stretch:normal; font-style:normal; font-variant:normal; font-weight:normal; line-height:1.4; text-align:center; }

body, ul, ol, dl, dd, h1, h2, h3, h4, h5, h6, p, form, fieldset, legend, input, textarea, select, button, th, td { margin:0; padding:0; }

h1, h2, h3, h4, h5, h6 { font-size:100%;

font-weight:normal; }

table {

font-size:inherit; }

input, select {

font-family:arial,helvetica,clean,sans-serif; font-size:100%;

font-size-adjust:none; font-stretch:normal; font-style:normal; font-variant:normal;

font-weight:normal; line-height:normal; }

button {

overflow:visible; }

th, em, strong, b, address, cite { font-style:normal; font-weight:normal; } li {

list-style-image:none;

list-style-position:outside; list-style-type:none; }

img, fieldset { border:0 none; }

ins {

text-decoration:none; }

在《超越css》一书中建议我们做网站开始重置所有默认样式：

/* Normalizes margin,padding */

body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,fieldset,input,p,blockquote,th,td { margin:0;padding:0}

/* Normalizes font-size for headers */ h1,h2,h3,h4,h5,h6 { font-size:100%}

/* Removes list-style from lists */ ol,ul { list-style:none }

/* Normalizes font-size and font-weight to normal */

address,caption,cite,code,dfn,em,strong,th,var { font-size:normal; font-weight:normal }

/* Removes list-style from lists */

table { border-collapse:collapse; border-spacing:0 }

/* Removes border from fieldset and img */ fieldset,img { border:0 }

YUI:

body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,fieldset,input,textarea,p,blockquote,th,td { margin:0; padding:0; }

table {

border-collapse:collapse; border-spacing:0; }

fieldset,img { border:0; }

address,caption,cite,code,dfn,em,strong,th,var { font-style:normal; font-weight:normal; }

ol,ul {

list-style:none; }

caption,th {

text-align:left; }

h1,h2,h3,h4,h5,h6 { font-size:100%;

font-weight:normal; }

q:before,q:after { content:''; }

abbr,acronym { border:0; }

结合他们的css reset写法，再根据自己的实际情况，一定能写出符合自己网站的完美的css reset。

/* Left-aligns text in caption and th */ caption,th { text-align:left }

/* Removes quotation marks from q */ q:before,q:after { content:''}

那我们实际写代码的时候该怎么来css reset呢？ 我个人推荐使用（Eric Meyer和YUI）的 css reset Eric Meyer's Reset:

html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, font, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center,

dl, dt, dd, ol, ul, li,

fieldset, form, label, legend,

table, caption, tbody, tfoot, thead, tr, th, td { margin: 0; padding: 0; border: 0; outline: 0;

font-size: 100%;

vertical-align: baseline; background: transparent; }

body {

line-height: 1; }

ol, ul {

list-style: none; }

blockquote, q { quotes: none; }

blockquote:before, blockquote:after, q:before, q:after { content: ''; content: none; }

/* remember to define focus styles! */ :focus {

outline: 0; }

/* remember to highlight inserts somehow! */ ins {

text-decoration: none; }

del {

text-decoration: line-through; }

/* tables still need 'cellspacing="0"' in the markup */ table {

border-collapse: collapse; border-spacing: 0; }

body {

background-color:#FFFFFF; color:#666666;

font-family:Helvetica,Arial,sans-serif; font-size:12px; padding:0 10px; text-align:left; }

select {

font-size:12px; }

table {

border-collapse:collapse; }

fieldset, img { border:0 none; }

fieldset { margin:0; padding:0; }

fieldset p { margin:0;

padding:0 0 0 8px; }

legend {

display:none; }

address, caption, em, strong, th, i { font-style:normal; font-weight:400; }

table caption { margin-left:-1px; } hr {

border-bottom:1px solid #FFFFFF; border-top:1px solid #E4E4E4; border-width:1px 0; clear:both; height:2px; margin:5px 0; overflow:hidden; }

ol, ul {

list-style-image:none;

list-style-position:outside; list-style-type:none; }

caption, th { text-align:left; }

q:before, q:after, blockquote:before, blockquote:after { content:""; }